252439919 has 8 divisors (see below), whose sum is σ = 269886240. Its totient is φ = 235282176.

The previous prime is 252439907. The next prime is 252439921. The reversal of 252439919 is 919934252.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-252439919 is a prime.

It is a super-2 number, since 2×252439919² = 127451825409453122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252439919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252439969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70334 + ... + 73835.

It is an arithmetic number, because the mean of its divisors is an integer number (33735780).

Almost surely, 2^252439919 is an apocalyptic number.

252439919 is a deficient number, since it is larger than the sum of its proper divisors (17446321).

252439919 is a wasteful number, since it uses less digits than its factorization.

252439919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144289.

The product of its digits is 174960, while the sum is 44.

The square root of 252439919 is about 15888.3579705393. The cubic root of 252439919 is about 632.0032972308.

The spelling of 252439919 in words is "two hundred fifty-two million, four hundred thirty-nine thousand, nine hundred nineteen".